CN109337383A - A kind of collagen-based selfreparing hydrogel and preparation method thereof - Google Patents

A kind of collagen-based selfreparing hydrogel and preparation method thereof Download PDF

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CN109337383A
CN109337383A CN201811162386.0A CN201811162386A CN109337383A CN 109337383 A CN109337383 A CN 109337383A CN 201811162386 A CN201811162386 A CN 201811162386A CN 109337383 A CN109337383 A CN 109337383A
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collagen
guar gum
solution
mol
concentration
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CN109337383B (en
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丁翠翠
张敏
兰飞
龚凌诸
郑志功
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Fujian Agriculture and Forestry University
Fujian University of Technology
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Fujian Agriculture and Forestry University
Fujian University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
    • C08J3/075—Macromolecular gels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
    • C08B37/0087—Glucomannans or galactomannans; Tara or tara gum, i.e. D-mannose and D-galactose units, e.g. from Cesalpinia spinosa; Tamarind gum, i.e. D-galactose, D-glucose and D-xylose units, e.g. from Tamarindus indica; Gum Arabic, i.e. L-arabinose, L-rhamnose, D-galactose and D-glucuronic acid units, e.g. from Acacia Senegal or Acacia Seyal; Derivatives thereof
    • C08B37/0096—Guar, guar gum, guar flour, guaran, i.e. (beta-1,4) linked D-mannose units in the main chain branched with D-galactose units in (alpha-1,6), e.g. from Cyamopsis Tetragonolobus; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2389/00—Characterised by the use of proteins; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates

Abstract

The invention discloses a kind of collagen-based selfreparing hydrogels and preparation method thereof, its by the mixed solution of collagen solution and guar gum and dialdehyde guar gum after mixing, it adds after borax soln is stirred, it is made through vacuum defoamation, scheme provides a kind of feasible way and new approaches to prepare self-repair type collagen based aquagel through the invention, in addition, self-healing property hydrogel obtained by the present invention program can better meet the requirement of injection aquagel, and the structure being destroyed in injection process can be rebuild in vivo；Also, self-healing property hydrogel has unique advantage as three-dimensional support for cell culture, can more preferable simulation cells survival environment, facilitate intercellular contact information transmitting, a variety of, multi-layer cellular co-cultivation of realization etc..

Description

A kind of collagen-based selfreparing hydrogel and preparation method thereof
Technical field
The present invention relates to collagen-based materials technical field, especially a kind of collagen-based selfreparing hydrogel and preparation method thereof.
Background technique
Collagen is the most protein of animal in-vivo content, accounts for about the one third of gross protein in animal body.Collagen tool The excellent performances such as some low antigenicities, good biocompatibility and biological degradability keep it defeated in biomedical material, drug It send each field such as carrier, organizational project, cosmetics to acquire to be widely applied.In recent years, protein hydrogel is as a kind of Important biomaterial is widely used in biological medicine and field of tissue engineering technology.Protein hydrogel be by protein molecule, The natural substrates with three-dimensional net structure of water and crosslinking agent composition.Collagen hydrogel is because of the similar and energy to natural tissues property Enough biodegrades, correlative study have attracted the concern of more and more researchers, have especially had intelligent response to environment Gel, it has also become the hot spot of soft substance scientific research field.
Currently, the preparation method of collagen hydrogel mainly has physical method and chemical method.Physical hydrogel is due to strand Tangle and ion, hydrogen bond, hydrophobic interaction and the network structure formed, such as by collagen accumulation self assembly, circulating freezing resistance, with The methods of other materials blending obtains collagen hydrogel.Chemical hydrogel is mainly by tropocollagen molecule or intermolecular activity Cross-bond is generated between group and forms cross-linked network structure, and common chemical cross-linking agent has carbodiimides, glutaraldehyde etc..Object Collagen Type VI hydrogel is managed, often mechanical property and formability are poor, and thermal stability and resistance to enzyme effect ability equistability are bad；And By the collagen hydrogel of chemical crosslinking preparation, disadvantages mentioned above can be obviously improved.
With the collagen hydrogel of prior art preparation, there are still the defects by cracky when external force at present.For physics For collagen hydrogel prepared by method, since its intermolecular force is weaker, by being easily destroyed when external force；And by altogether The hydrogel that valence link is cross-linked to form, network structure is stable and the mechanical property of gel is improved, but this also beam simultaneously The mobility for having tied up strand increases its brittleness, and is difficult to independently repair after being destroyed.This not self-healing property gives birth to implantation The intracorporal collagen hydrogel of object ruptures due to being damaged by external force or other factors, and is difficult to method reparation manually, and then contract The short hydrogel implants service life jeopardizes patient health and safety.
Summary of the invention
The case where based on the prior art, prepares the purpose of the present invention is to provide a kind of simply, with excellent mechanical property And the collagen-based selfreparing hydrogel and preparation method thereof that self-repairability is good.
For collagen as a kind of native protein, molecular side chain contains a large amount of active amino, has formation schiff bases Condition.Therefore, the present invention proposes a kind of preparation method of self-repair type hydrogel, and the preferable guar gum of biocompatibility is changed Cause aldehyde radical crosslinking agent, then react with the active amino of collagen and generate cross-bond, borax is then added, with collagen and Guar gum generates reversible ionic crosslinked action, to obtain the self-healing property collagen hydrogel with excellent mechanical property.Self-healing property Hydrogel can better meet the requirement of injection aquagel, and the structure being destroyed in injection process can weigh in vivo It builds.In addition, self-healing property hydrogel has unique advantage as three-dimensional support for cell culture, it being capable of more preferable simulation cells survival Environment facilitates intercellular contact information transmitting, realizes a variety of, multi-layer cellular co-cultivation etc..
In order to realize above-mentioned technical purpose, the technical solution adopted by the present invention are as follows:
A kind of collagen-based selfreparing hydrogel is uniformly mixed by collagen solution with the mixed solution of guar gum and dialdehyde guar gum Afterwards, it adds after borax soln is stirred, is made through vacuum defoamation.
A kind of preparation method of collagen-based selfreparing hydrogel comprising following specific steps:
(1) by collagenolysis in the acetum that concentration is 0.01~0.1 mol/L, then after mixing evenly, quality is made Concentration is the collagen solution of 10~30 mg/mL；
(2) guar gum and dialdehyde are pipetted respectively by the ratio that guar gum and dialdehyde guar gum mass concentration ratio are 0.5~4: 1 It guar gum and is dissolved in deionized water simultaneously, is then stirred 2~6 h under the conditions of 30~80 DEG C of temperature, total matter is made Measure guar gum/dialdehyde guar gum combination solution that concentration is 10~30 mg/mL；
(3) borax is dissolved in PBS buffer solution, the borax soln that mass concentration is 0.05~0.2 mol/L is made；
(4) collagen solution made from the mass concentrations step (1) such as general is compounded with guar gum made from step (2)/dialdehyde guar gum Solution is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution mass ratio 4: 1 and is stirred It is even, the hydroxide of concentration is 0.2~0.4 mol/L and pH is 8 PBS buffer solution, 0.5~2 mol/L is then sequentially added again Sodium solution and sodium chloride, and keep final 0.05~0.1 mol/L of PBS buffer solution concentration, sodium hydroxide after mixing dense Degree is 0.04~0.16 mol/L, sodium chloride concentration is 0.05~0.2 mol/L；
(5) the step of borax soln that concentration made from step (3) is 0.05~0.2 mol/L being added (4) mixing obtained In system, after 0.5~3 h of agitated processing, then vacuum defoamation processing is carried out, after being then allowed to stand 0.5~12 h of processing, glue is made Former base selfreparing hydrogel.
Further, step (4) operates in the environment of 4~37 DEG C.
Further, the tetraboric acid radical ion in step (5) in borax soln in mixed system final concentration of 0.5~2 mol/L。
Further, collagen as described in step (1) is made of following steps method:
1) it by after Animal Skin stripping and slicing, then handles through rubbing, the pepsin and 0.1~0.5 for being equivalent to its 3% weight in wet base is then added The acetic acid of mol/L is mixed, then mixed system is put into mechanical shaking extraction in the constant-temperature table that temperature is 4 DEG C and is handled, and shaking table turns Speed is 180 r/min, and the processing time is 48~72 h, as one embodiment, 10 g can be rubbed ox-hide and be placed in 1 L taper In bottle, the acetic acid that then addition is equivalent to the pepsin of its 3% weight in wet base and 500 mL concentration are 0.1~0.5 mol/L is mixed It closes；
2) by mechanical shaking extraction, treated after solution is sequentially centrifuged, saltoutd and be centrifuged again, will centrifugation gained solid content it is molten In the acetic acid of 0.1~0.5 mol/L, then by the solution dissolved be fitted into bag filter to deionized water dialysis processing 48~ Spongy acid -soluble collagen will be made after finally handling 72 h of products therefrom progress vacuum freeze drying processing in 72 h.
It is further preferred that Animal Skin described in step 1) is ox-hide, pigskin or fish-skin.
It is further preferred that step 2 further includes the freeze-day with constant temperature environment that spongy acid -soluble collagen obtained is placed in 4 DEG C In be kept in dark place.
As one embodiment, further, the dialdehyde guar gum in step (2) is made by following steps method:
1) 5~10g guar gum is dissolved in 50mL ethanol solution, it is 0.1~0.5mol/L's that 40mL concentration, which is then added, NaIO4Solution is mixed, and is then protected from light 12~24 h at room temperature；
2) step 1) after the reaction was completed, 0.5~2 mL ethylene glycol solution is added into mixed system and is stirred at normal temperature mixed Close 0.5~2 h；Then reaction product is taken out and carries out carrying out washing treatment to net with the tert-butyl alcohol, then the reaction product after clean It carries out vacuum refrigeration and handles 12~24 h, dialdehyde guar gum is made after finally being ground freezing processing products therefrom.
Preferably, the number that the tert-butyl alcohol carries out carrying out washing treatment in step 2 is 3~5 times.
Preferably, the hydroformylation degree of dialdehyde guar gum obtained in step 2 is 4%~18%.
Using above-mentioned technical solution, compared with prior art, the present invention it has the beneficial effect that the present invention passes through The aldehyde radical guar gum (i.e. dialdehyde guar gum) of low hydroformylation degree, the amino generating portion chemical crosslinking of aldehyde radical and collagen is added Key forms network structure, and hydrogel is made to have certain intensity and mouldability；It is re-introduced into ionization, with guar gum and collagen The groups such as hydroxyl, carboxyl form ionic bond, generate a large amount of reversible binding sites, assign energy dissipation mechanism, have gel There are preferable toughness and self-repairability；The present invention program provides a kind of feasible way to prepare self-repair type collagen based aquagel And new approaches, in addition, self-healing property hydrogel obtained by the present invention program can better meet the requirement of injection aquagel, The structure being destroyed in injection process can be rebuild in vivo；Also, self-healing property hydrogel is carried as Three-dimensional cell culture Body has unique advantage, can more preferable simulation cells survival environment, facilitate intercellular contact information transmitting, realization is more Kind, co-cultivation of multi-layer cellular etc..
Detailed description of the invention
The present invention is further elaborated with reference to the accompanying drawings and detailed description:
Fig. 1 is the selfreparing demonstrating effect figure of collagen-based selfreparing hydrogel of the present invention.
Specific embodiment
A kind of preparation method of collagen-based selfreparing hydrogel comprising following specific steps:
(1) by collagenolysis in the acetum that concentration is 0.01~0.1 mol/L, then after mixing evenly, quality is made Concentration is the collagen solution of 10~30 mg/mL；
(2) guar gum and dialdehyde are pipetted respectively by the ratio that guar gum and dialdehyde guar gum mass concentration ratio are 0.5~4: 1 It guar gum and is dissolved in deionized water simultaneously, is then stirred 2~6 h under the conditions of 30~80 DEG C of temperature, total matter is made Measure guar gum/dialdehyde guar gum combination solution that concentration is 10~30 mg/mL；
(3) borax is dissolved in PBS buffer solution, the borax soln that mass concentration is 0.05~0.2 mol/L is made；
(4) under 4~37 DEG C of ambient temperature conditions, collagen solution made from the mass concentrations step (1) such as general and step (2) are made Guar gum/dialdehyde guar gum the combination solution obtained is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution Mass ratio be 4: 1 and to be uniformly mixed, it is slow that the PBS that concentration is 0.2~0.4 mol/L and pH is 8 is then sequentially added again The sodium hydroxide solution and sodium chloride of fliud flushing, 0.5~2 mol/L, and make final PBS buffer solution concentration after mixing 0.05~0.1 mol/L, naoh concentration are 0.04~0.16 mol/L, sodium chloride concentration is 0.05~0.2 mol/L；
(5) the step of borax soln that concentration made from step (3) is 0.05~0.2 mol/L being added (4) mixing obtained In system, after 0.5~3 h of agitated processing, keep the tetraboric acid radical ion in borax soln final concentration of in mixed system 0.5~2 mol/L then carries out vacuum defoamation processing again, and after being then allowed to stand 0.5~12 h of processing, collagen-based selfreparing is made Hydrogel.
Wherein, collagen as described in step (1) is made of following steps method:
1) by after Animal Skin (Animal Skin can be ox-hide, pigskin or fish-skin) stripping and slicing, then handle through rubbing, then plus The acetic acid of the pepsin and 0.1~0.5 mol/L that enter to be equivalent to its 3% weight in wet base is mixed, then mixed system is put into temperature It is handled for mechanical shaking extraction in 4 DEG C of constant-temperature tables, shaking speed is 180 r/min, and the processing time is 48~72 h, as one kind Embodiment, can by 10 g rub ox-hide be placed in 1 L conical flask, then be added be equivalent to its 3% weight in wet base pepsin and 500 mL concentration are that the acetic acid of 0.1~0.5 mol/L is mixed；
2) by mechanical shaking extraction, treated after solution is sequentially centrifuged, saltoutd and be centrifuged again, will centrifugation gained solid content it is molten In the acetic acid of 0.1~0.5 mol/L, then by the solution dissolved be fitted into bag filter to deionized water dialysis processing 48~ Spongy acid -soluble collagen will be made after finally handling 72 h of products therefrom progress vacuum freeze drying processing in 72 h, obtained Spongy acid -soluble collagen need to be placed in 4 DEG C of freeze-day with constant temperature environment and be kept in dark place.
In addition, the dialdehyde guar gum in step (2) is made by following steps method:
1) 5~10g guar gum is dissolved in 50mL ethanol solution, it is 0.1~0.5mol/L's that 40mL concentration, which is then added, NaIO4Solution is mixed, and is then protected from light 12~24 h at room temperature；
2) step 1) after the reaction was completed, 0.5~2 mL ethylene glycol solution is added into mixed system and is stirred at normal temperature mixed Close 0.5~2 h；Then reaction product is taken out and carries out carrying out washing treatment 3~5 times to net with the tert-butyl alcohol, then anti-after clean It answers product to carry out vacuum refrigeration and handles 12~24 h, dialdehyde Guar is made after finally being ground freezing processing products therefrom Glue, the hydroformylation degree of obtained dialdehyde guar gum are 4%~18%.
Fig. 1 shows the selfreparing demonstrating effect figure of collagen-based selfreparing hydrogel of the present invention, can be by will be circular Collagen-based selfreparing hydrogel half-and-half isolates, and after then wherein half carries out dyeing processing, then it is bonded again, stewing process After 0.5~10min, with tweezers can integrated hanging pick up, and be bonded after hydrogel two parts will not be detached from, in addition its tie The contact interface of conjunction disappears, dyestuff diffuse to it is undyed the other half, by the phenomenon can prove collagen-based of the invention from Repair hydrogel has excellent self-healing performance.
Embodiment 1
(1) 5g guar gum is dissolved in 50 mL ethyl alcohol, the NaIO that 40 mL concentration are 0.1 mol/L is added4Solution, at room temperature It is protected from light 12 h；After the completion of oxidation reaction, 0.5 mL ethylene glycol solution is added into mixed solution and terminates reaction, and normal After 0.5 h of the lower stirring of temperature；With tert-butyl alcohol washing reaction product 3 times, vacuum refrigeration is carried out after cleaning to it and handles 12 h, then will Processing products therefrom obtains powdered aldehyde radical guar gum after being ground, hydroformylation degree is 4%.
(2) ox-hide is cut into small pieces, is put into meat grinder and rubs, then the rubbing ox-hide of weight in wet base about 10g is put into the cone of 1 L In shape bottle, the pepsin for being equivalent to ox-hide weight in wet base 3% and 500 mL concentration are added for the acetic acid of 0.1 mol/L, then by it It is put into mechanical shaking extraction in 4 DEG C of constant-temperature tables, revolving speed is 180 r/min, 48 h of time.Solution after mechanical shaking extraction sequentially pass through from The heart, saltout, again be centrifuged after be dissolved in the acetic acid of 0.1 mol/L, by the collagen solution dissolved be fitted into bag filter to go from 48 h of sub- water dialysis, finally carry out vacuum freeze drying to the resulting product of processing and handle 72 h；It is freeze-dried to complete to be made Spongy acid -soluble collagen is subsequently placed in 4 DEG C of freeze-day with constant temperature environment and is kept in dark place.
(3) prepared by collagen solution: collagen sponge being dissolved in the acetum of 0.01mol/L, is stirred evenly, matter is made Measure the collagen solution that concentration is 10mg/mL；
(4) guar gum/dialdehyde guar gum combination solution preparation: pipetting guar gum and dialdehyde guar gum (being in mass ratio 1/2) will It is dissolved in deionized water simultaneously, then under the conditions of 30 DEG C under stir about 2 h, it is 10mg/mL that total mass concentration, which is made, Guar gum/dialdehyde guar gum combination solution；
(5) prepared by borax soln: borax being dissolved in the PBS buffer solution that pH is 6.0, it is 0.05 mol/L that mass concentration, which is made, Borax soln；
(6) at 4 DEG C, by guar gum/dialdehyde Guar made from collagen solution made from comparable sodium step (3) and step (4) Glue combination solution is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution mass ratio 4/1, stirring Uniformly, the PBS buffer solution of pH=8 of 0.2mol/L, 0.5mol/L sodium hydroxide solution and sodium chloride, final PBS is then added Concentration be 0.05mol/L, the concentration of sodium hydroxide is 0.04mol/L, and sodium chloride concentration is 0.05 mol/L, stir evenly, It is eventually adding the borax soln (final tetraboric acid ion concentration is 0.5mol/L) of 0.05mol/L, after being again stirring for 0.5h, warp Collagen-based selfreparing hydrogel is made in 0.5 h of vacuum defoamation and stewing process.
Embodiment 2
(1) 10 g guar gums are dissolved in 50 mL ethyl alcohol, the NaIO of 0.5 mol/L of 40 mL is added4Solution is kept away at room temperature 24 h of light reaction；After the completion of oxidation reaction, 2 mL ethylene glycol solutions are added into product and terminate reaction, stir 2 h under room temperature；With Tert-butyl alcohol washing reaction product 5 times carries out vacuum refrigeration to it and handles 24 h after cleaning, then will handle resulting product and carry out Powdered aldehyde radical guar gum is obtained after grinding, hydroformylation degree is 8%；
(2) ox-hide is cut into small pieces, is put into meat grinder and rubs, the rubbing ox-hide of about 10 g of weight in wet base is put into the conical flask of 1 L In, the pepsin for being equivalent to ox-hide weight in wet base 3% and 500 mL concentration are added as the acetic acid of 0.5 mol/L, then put it into Mechanical shaking extraction in 4 DEG C of constant-temperature tables, revolving speed are 180 r/min, 72 h of time.Solution after mechanical shaking extraction is centrifuged, saltoutd, It is dissolved in the acetic acid of 0.5 mol/L after being centrifuged again, the collagen solution dissolved is fitted into bag filter to deionized water dialysis 72 h finally carry out vacuum freeze drying to the resulting product of processing and handle 72 h；Spongy acid is made in freeze-dried completion Procollagen is subsequently placed in 4 DEG C of freeze-day with constant temperature environment and is kept in dark place；
(3) prepared by collagen solution: collagen sponge being dissolved in the acetum of 0.1 mol/L, is stirred evenly, it is dense that quality is made Degree is the collagen solution of 30 mg/mL；
(4) guar gum/dialdehyde guar gum combination solution preparation: pipette guar gum and dialdehyde guar gum (mass ratio 4/1) by its It is dissolved in deionized water simultaneously, 6 h is then stirred at 80 DEG C, the guar gum that obtained total mass concentration is 30 mg/mL/bis- Aldehyde guar gum combination solution；
(5) prepared by borax soln: borax being dissolved in the PBS buffer solution that pH is 8, it is 0.2 mol/L's that mass concentration, which is made, Borax soln；
(6) at 37 DEG C, by guar gum/dialdehyde Guar made from collagen solution made from comparable sodium step (3) and step (4) Glue combination solution is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution mass ratio 4/1, stirring Uniformly；Then PBS buffer solution, 2mol/L sodium hydroxide solution and the sodium chloride that the pH of 0.4 mol/L is 8 is added, final PBS is slow The concentration of fliud flushing is 0.1 mol/L, and the concentration of sodium hydroxide is 0.16 mol/L, and sodium chloride concentration is 0.2 mol/L, and stirring is equal After even, the borax soln (final 2 mol/L of tetraboric acid ion concentration) of 0.2 mol/L is added, after being again stirring for 3 h, warp Collagen-based selfreparing hydrogel is made in 12 h of vacuum defoamation and stewing process.
Embodiment 3
(1) 1 g guar gum solution is stirred evenly in 100 mL deionized waters, is then added 0.05 mol/L's of 50 mL NaIO4Solution is protected from light is stirred to react 6 h at room temperature；After the completion of oxidation reaction, it is whole that 1 mL ethylene glycol solution is added into product It only reacts, 1 h is stirred under room temperature；With tert-butyl alcohol washing reaction product 4 time, vacuum refrigeration is carried out after cleaning to it and handles 16 h, Then it will handle and obtain powdered dialdehyde guar gum after resulting product is ground, hydroformylation degree is 18%；
(2) ox-hide is cut into small pieces, is put into meat grinder and rubs；The rubbing ox-hide of weight in wet base about 10g is put into the conical flask of 1 L In, the pepsin for being equivalent to ox-hide weight in wet base 3% and 500 mL concentration are added as the acetic acid of 0.25 mol/L, then put it into Mechanical shaking extraction in 4 DEG C of constant-temperature tables, revolving speed are 180 r/min, 60 h of time；Solution after mechanical shaking extraction is centrifuged, saltoutd, It is dissolved in the acetic acid of 0.25 mol/L after being centrifuged again, the collagen solution dissolved is fitted into bag filter to deionized water dialysis 60 h, last vacuum freeze drying handle 72 h；
(3) prepared by collagen solution: collagen sponge being dissolved in the acetum of 0.05 mol/L, is stirred evenly, quality is made Concentration is the collagen solution of 20 mg/mL；
(4) guar gum/dialdehyde guar gum combination solution preparation: pipette guar gum and dialdehyde guar gum (mass ratio 1/1) by its It is dissolved in deionized water simultaneously, 3 h is then stirred at 40 DEG C, the guar gum that obtained total mass concentration is 20 mg/mL/bis- Aldehyde guar gum combination solution；
(5) prepared by borax soln: borax being dissolved in the PBS buffer solution that pH is 7, it is 0.1 mol/L's that mass concentration, which is made, Borax soln；
(6) at 20 DEG C, by guar gum/dialdehyde Guar made from collagen solution made from comparable sodium step (3) and step (4) Glue combination solution is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution mass ratio 1/1, stirring Uniformly；Then the PBS buffer solution of pH=8 of 0.3 mol/L, 1.0 mol/L sodium hydroxide solutions and sodium chloride, final PBS is added The concentration of buffer is 0.075 mol/L, and the concentration of sodium hydroxide is 0.1 mol/L, and sodium chloride concentration is 0.1 mol/L, is stirred The borax soln (final tetraboric acid ion concentration is 1.0 mol/L) for being uniformly eventually adding 0.1 mol/L is mixed, is again stirring for 2 After h, through 6 h of vacuum defoamation and stewing process, collagen-based selfreparing hydrogel is made.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent With modification, covering scope of the invention is come under.

Claims (10)

1. a kind of collagen-based selfreparing hydrogel, it is characterised in that: it is mixed by collagen solution and guar gum and dialdehyde guar gum It closes solution after mixing, adds after borax soln is stirred, be made through vacuum defoamation.
2. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 1, it is characterised in that: it includes such as Lower specific steps:
(1) by collagenolysis in the acetum that concentration is 0.01~0.1 mol/L, then after mixing evenly, quality is made Concentration is the collagen solution of 10~30 mg/mL；
(2) guar gum and dialdehyde are pipetted respectively by the ratio that guar gum and dialdehyde guar gum mass concentration ratio are 0.5~4: 1 It guar gum and is dissolved in deionized water simultaneously, is then stirred 2~6 h under the conditions of 30~80 DEG C of temperature, total matter is made Measure guar gum/dialdehyde guar gum combination solution that concentration is 10~30 mg/mL；
(3) borax is dissolved in PBS buffer solution, the borax soln that mass concentration is 0.05~0.2 mol/L is made；
(4) collagen solution made from the mass concentrations step (1) such as general is compounded with guar gum made from step (2)/dialdehyde guar gum Solution is blended in proportion, makes collagen solution and guar gum/dialdehyde guar gum combination solution mass ratio 4: 1 and is stirred It is even, be then sequentially added again concentration be the PBS buffer solution of 0.2~0.4 mol/L, 0.5~2 mol/L sodium hydroxide solution and Sodium chloride, and make final 0.05~0.1 mol/L of PBS buffer solution concentration, naoh concentration 0.04 after mixing ~0.16 mol/L, sodium chloride concentration are 0.05~0.2 mol/L；
(5) the step of borax soln that concentration made from step (3) is 0.05~0.2 mol/L being added (4) mixing obtained In system, after 0.5~3 h of agitated processing, then vacuum defoamation processing is carried out, after being then allowed to stand 0.5~12 h of processing, glue is made Former base selfreparing hydrogel.
3. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 2, it is characterised in that: step (1) Described in collagen be made of following steps method:
1) it by after Animal Skin stripping and slicing, then handles through rubbing, the pepsin and 0.1~0.5 for being equivalent to its 3% weight in wet base is then added The acetic acid of mol/L is mixed, then mixed system is put into mechanical shaking extraction in the constant-temperature table that temperature is 4 DEG C and is handled, and shaking table turns Speed is 180 r/min, and the processing time is 48~72 h；
2) by mechanical shaking extraction, treated after solution is sequentially centrifuged, saltoutd and be centrifuged again, will centrifugation gained solid content it is molten In the acetic acid of 0.1~0.5 mol/L, then by the solution dissolved be fitted into bag filter to deionized water dialysis processing 48~ Spongy acid -soluble collagen will be made after finally handling 72 h of products therefrom progress vacuum freeze drying processing in 72 h.
4. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 3, it is characterised in that: step 1) institute The Animal Skin stated is ox-hide, pigskin or fish-skin.
5. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 3, it is characterised in that: step 2 It further include that spongy acid -soluble collagen obtained is placed in 4 DEG C of freeze-day with constant temperature environment to be kept in dark place.
6. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 2, it is characterised in that: step (2) In dialdehyde guar gum be made by following steps method:
1) 5~10g guar gum is dissolved in 50mL ethanol solution, it is 0.1~0.5mol/L's that 40mL concentration, which is then added, NaIO4Solution is mixed, and is then protected from light 12~24 h at room temperature；
2) step 1) after the reaction was completed, 0.5~2 mL ethylene glycol solution is added into mixed system and is stirred at normal temperature mixed Close 0.5~2 h；Then reaction product is taken out and carries out carrying out washing treatment to net with the tert-butyl alcohol, then the reaction product after clean It carries out vacuum refrigeration and handles 12~24 h, dialdehyde guar gum is made after finally being ground freezing processing products therefrom.
7. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 6, it is characterised in that: in step 2 The number that the tert-butyl alcohol carries out carrying out washing treatment is 3~5 times.
8. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 6, it is characterised in that: in step 2 The hydroformylation degree of obtained dialdehyde guar gum is 4%~18%.
9. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 2, it is characterised in that: step (4) It is operated in the environment of 4~37 DEG C.
10. a kind of preparation method of collagen-based selfreparing hydrogel according to claim 2, it is characterised in that: step (5) final concentration of 0.5~2 mol/L of the tetraboric acid radical ion in mixed system in borax soln.
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